1278041415 has 32 divisors (see below), whose sum is σ = 2371883520. Its totient is φ = 575524224.

The previous prime is 1278041389. The next prime is 1278041423. The reversal of 1278041415 is 5141408721.

It is not a de Polignac number, because 1278041415 - 2¹⁶ = 1277975879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83800 + ... + 97869.

It is an arithmetic number, because the mean of its divisors is an integer number (74121360).

Almost surely, 2^1278041415 is an apocalyptic number.

1278041415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1278041415 is a deficient number, since it is larger than the sum of its proper divisors (1093842105).

1278041415 is a wasteful number, since it uses less digits than its factorization.

1278041415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181751.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 1278041415 is about 35749.7051036788. The cubic root of 1278041415 is about 1085.2129704334.

The spelling of 1278041415 in words is "one billion, two hundred seventy-eight million, forty-one thousand, four hundred fifteen".